This is why you use the 'temporary' ones first (which you place under your lips, against the gum) so it absorbs into your bloodstream without having to swallow, allowing you enough time to swallow and keep down the 'proper' anti nausea pill. Unfortunately I know this from experience. Lets just say, oestrogen -not my thing!

When I had my morning sickness, (mine wasn't as bad as most) I always felt 100% better after I did throw up.
Nowadays, whenever I'm ill, I don't debate "Should I or shouldn't I?" I just listen to my body and get it over with as quickly as I can so I can start to feel better. Throwing up is never fun but the body is designed to find a way to get rid of whatever is ailing you.